Projectile motion (part 3)

[Kricardose]

I am very happy to see the vidoe An example of solving for the final velocity when you know the change in distance, time, initial velocity, and acceleration after you give this

[bebeheuy]

I Love The Video An example of solving for the final velocity when you know the change in distance, time, initial velocity, and acceleration It Can Increase My Knowledge

[Mjhond]

Steady I Really Like This Video An example of solving for the final velocity when you know the change in distance, time, initial velocity, and acceleration

[kaathrynncruz]

Those 4 dislikes are 4 jealous physics teachers.

[CrazyKing89]

why don't you write the initial velocity as U? As it's standard notation.

[emptylset]

@amauta5 Actually, if you solve it correctly, you will: Because you are solving for when the penny stops going up V_subf=0 and V_subi=30. Thus, 0^2 = 30^2 + 2(-10)deltaD. -900=-20deltaD. DeltaD=45m. Added to the other distance = 545. Final v sq= 0^2 + 2(-10)(-545) or; V_subf=sqr(10900). No mistakes, just misinterpretations.

[amauta5]

Question, if you first solve how high the penny went up at 30m/s and then get that height and add it to the cliff's height... the final velocity does not equal the same.

findingin how high the penny went: final^2= initial^2 + 2 (gravity) deltaX = 1.5m

Add 1.5 to 500, gives you a free fall equation to find the final velocity^2 = initial^2 + 2 (-10) -501.5) = 100.14

Are we missing soetihng?

[blo0dyme]

I've learned more about physics watching your videos for 30 minutes than I have from my class in 5 weeks.

I'm grateful for you, but it's rather unfortunate that our school systems are such garbage.

[soopa123]

@blo0dyme so true, thign is, whe nu look for these videos it means you want to learn it ... when ur at school ur forced to learn it ... that may be the difference oh and ofc hes a great teacher

[healthsally]

Thanks for the teaching! I love it. You are wonderful!

In the beginning of the video, you forget to write acceleration in your 1st equation. I thought you might not see it. I just want you to know.

I love your work, please keep up with your wonderful work. I learn a lot from you. Thanks again!

[lol960]

I just realized this guy uses paint! Why the hell isn't the government funding this? Get this man some better equipment so he can make more of these!

[Soulscarz]

Youtube=tutor i freakin love these videos, you and patrickjmt are the freakin man!

[MrWeedmaster777]

your the best teacher

[MrWeedmaster777]

your the man

[whwsjackfrost]

i thought it was Vfsq=Visq+2ad? where is acceleration?

[angularvelocity]

wow...he has turned such interesting subject into a boring video with nothing to watch except a black screen :(

I appreciate what he's doing, but i find the videos boring and dull.

[xxladybug94]

@angularvelocity

well to ppl who are confused out of their wits, it's the most amazing thing ever haha xD

[R2SweetTooth]

Is there any video with a proof for (Vi+Vf)/2= Va? It's logically understandable, but is there any mathematical proof?

[omgthatscrazyx]

you sir are a genius. you clearly know your physics and I learned much from you. thanks

[GeneralSaddam]

at 1.00 isnt it supposed to be + 2 X ad and not 2 X change in d?

[drstingrae]

Thanks, helps me think through this, as if I will time to think on MCAT

[doctormurray91]

ctrl+shift+N, ctrl+shift+I xD

Quicker ;)

Love every single one of these vidyas. Keep it up!

[clixsyt]

Does that mean the equation for time is a quadratic equation?

[ado254]

that is true

[azngurl321]

I'm in AP physics (without taking physics and precalc) so I'm SOO behind already. We've done only 2 units and the only reason why I've even had great grades is because of these videos. The teacher does teach, but it's at a slower level and he's more like, 'Here, read this and I'll review it next class" When I read it, it's like WHAT???

[godislove417]

YOU ARE THE BESTT!!!! I actually like physics now:)

[bsbooker]

Given: d, Vi, and a, you never did solve for t. I took d=(Vf^2-Vi^2)/2 from the last video, solved for Vf=sqrt(Vi^2+2ad), substituted this for Vf in the distance formula, and solved for t =(2d)/(Vi+sqrt(Vi^2+2ad)). These videos are helping me out a lot.

[SimeonBerson10101]

at 0:40 he repeats the equation as given from the previous video, but didnt the previous video state the equation as vf^2=vi^2+2ad?

where'd the acceleration go??

[Kanashto]

a mistake

[Crusader132]

@SimeonBerson10101 yeah he definitely made a mistake there. I noticed that as well. He is still the man,

[niranjan808]

@SimeonBerson10101 He some times makes some blunders but its alright

[amauta5]

@SimeonBerson10101 he messed up =(

[mshterk]

@SimeonBerson10101 i thought that too...

[Avalonsmistress7]

Hmm, I have a question. Although breaking down these formulas help a lot, is there an even simpiler way of using them; like in a timed test? How can I break them down without having to remember how to do things from square one?

[FAFHUN]

which program is he using to make the presentation? does anyone know?

[SimeonBerson10101]

microsoft paint. (you can clearly see in some videos)

[polos505]

I think you deserve to get a lot of money for your teaching,just by watching those videos I have learned more than my physic class.

[Katianie9]

yea same here. My physics teacher thinks my questions are stupid and to easy so I never learn anything. Ive learned within the past 5 videos almost the equivalent of what I have learned in class.

[jessicattie]

Agreed. His explanations are so much simpler than my science teacher's. -_-

[fiessehabh1]

how do you account the total distance??

[darkwspyder]

HOley moley, that's all the equations on my physics table. Thank you so much! I finally know how this works!